i2c: Convert SCx200 driver from using raw PCI to platform device
The SCx200 ACB driver supports ISA hardware as well as PCI. The PCI hardware is CS5535/CS5536 based, and the device that it grabs is handled by the cs5535-mfd driver. This converts the SCx200 driver to use a platform_driver rather than the previous PCI hackery. The driver used to manually track the iface list (via linked list); now it only does this for ISA devices. PCI ifaces are handled through standard driver model lists. It's unclear what happens in case of errors in the old ISA code; rather than pretending the code actually cares, I've dropped the (implicit) ignorance of return values and marked it with a comment. Signed-off-by: NAndres Salomon <dilinger@queued.net> Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>
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